public void AddFirst(T item)
{
lock (SyncRoot)
{
if (capacity == buffer.Count)
{
var remItem = buffer.RemoveLast();
CollectionChanged?.Invoke(NotifyCollectionChangedEventArgs <T> .Remove(remItem, capacity - 1));
}
buffer.AddFirst(item);
CollectionChanged?.Invoke(NotifyCollectionChangedEventArgs <T> .Add(item, 0));
}
}
public T RemoveLast()
{
lock (SyncRoot)
{
var index = buffer.Count - 1;
var item = buffer.RemoveLast();
CollectionChanged?.Invoke(NotifyCollectionChangedEventArgs <T> .Remove(item, index));
return(item);
}
}